Resolution: 800DPI Easy web navigation and scrolling wheel with retractable cable Precision optical sensor With LED light Super long working life Small size for notebook or children Ideally designed for use of travel or home office where space is limited on an airplane tray, desktop or home office Special lens optical technology ensures perfect response to mouse moving on any surface except glass Workable on any surface except glass USB and U+P combo ports available Compatible with Microsoft Windows 98, 2000, ME, NT and XP operating systems Mouse size: 70 x 45 x 32mm Packing: Inner: color box or blister Outer: 40 pieces/carton or according to customer's requirements Carton dimensions: 54.5 x 44.5 x 31cm Net weight: 5kg Gross weight: 6kg